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# Daya Loan API Implementation - Complete Guide
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**تاریخ تکمیل**: December 6, 2025
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**وضعیت**: ✅ 100% Complete - Production Ready
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**نسخه**: Real API v1.0
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---
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## 📋 خلاصه تغییرات
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### قبل از این بهروزرسانی:
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- ❌ CheckDayaLoanStatusCommandHandler: Skeleton با TODO
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- ❌ DayaLoanApiService: NotImplementedException
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- ✅ MockDayaLoanApiService: فقط برای تست
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### بعد از این بهروزرسانی:
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- ✅ DayaLoanApiService: کاملاً پیادهسازی شده
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- ✅ HttpClient configuration: با authentication و timeout
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- ✅ Status mapping: Persian descriptions → Enum
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- ✅ Error handling: کامل با fallback
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- ✅ Configuration: Switchable Mock/Real via appsettings
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---
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## 🔧 فایلهای تغییر یافته
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### 1. DayaLoanApiService.cs
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**مسیر**: `CMS/src/CMSMicroservice.Infrastructure/Services/DayaLoanApiService.cs`
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**تغییرات**:
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```csharp
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// BEFORE:
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public async Task<List<DayaLoanCheckResult>> CheckLoanStatusAsync(...)
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{
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throw new NotImplementedException("TODO: Implement real Daya API");
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}
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// AFTER: (~250 lines of implementation)
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- Request/Response Models با JsonPropertyName
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- HTTP POST به /api/merchant/contracts
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- Status mapping logic
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- Error handling با empty results
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- Multiple contracts handling (takes latest)
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```
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**Models اضافه شده**:
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- `DayaContractsRequest`: NationalCodes list
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- `DayaContractsResponse`: Succeed, Code, Message, Data
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- `DayaContractData`: NationalCode, ContractNumber, StatusDescription, DateTime
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**متدهای کلیدی**:
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- `CheckLoanStatusAsync`: Main entry point
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- `MapApiResponseToResults`: Convert API response to domain results
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- `MapStatusDescription`: Persian text → DayaLoanStatus enum
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- `CreateEmptyResults`: Fallback for errors
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---
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### 2. ConfigureServices.cs
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**مسیر**: `CMS/src/CMSMicroservice.Infrastructure/ConfigureServices.cs`
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**تغییرات**:
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```csharp
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// BEFORE:
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services.AddScoped<IDayaLoanApiService, MockDayaLoanApiService>();
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// AFTER:
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var useMock = configuration.GetValue<bool>("DayaApi:UseMock");
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if (useMock)
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{
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services.AddScoped<IDayaLoanApiService, MockDayaLoanApiService>();
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}
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else
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{
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services.AddHttpClient<IDayaLoanApiService, DayaLoanApiService>((sp, client) =>
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{
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var config = sp.GetRequiredService<IConfiguration>();
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client.BaseAddress = new Uri(config["DayaApi:BaseAddress"]!);
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client.DefaultRequestHeaders.Add("merchant-permission-key",
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config["DayaApi:MerchantPermissionKey"]);
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client.Timeout = TimeSpan.FromSeconds(30);
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})
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.SetHandlerLifetime(TimeSpan.FromMinutes(5));
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}
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```
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**ویژگیهای HttpClient**:
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- BaseAddress: Dynamic from config
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- Authentication: merchant-permission-key header
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- Timeout: 30 seconds
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- Handler Lifetime: 5 minutes (connection pooling)
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---
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### 3. appsettings.json
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**مسیر**: `CMS/src/CMSMicroservice.WebApi/appsettings.json`
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**بخش اضافه شده**:
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```json
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{
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"DayaApi": {
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"UseMock": false,
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"BaseAddress": "https://testdaya.tadbirandishan.com",
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"MerchantPermissionKey": "14752708$Db5Wk5hnhKO4FGuoKBUZIvHW5WO1NpCxYNy_sy8epfQ-d6n6vjeZJa6EnTq876cq",
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"CacheDurationMinutes": 20
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}
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}
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```
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**توضیح پارامترها**:
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- `UseMock`: اگر true باشد، MockDayaLoanApiService استفاده میشود
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- `BaseAddress`: URL سرویس Daya (Test یا Production)
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- `MerchantPermissionKey`: کلید احراز هویت
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- `CacheDurationMinutes`: مدت cache در سمت Daya (فقط اطلاعاتی)
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---
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### 4. DayaLoanStatus.cs
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**مسیر**: `CMS/src/CMSMicroservice.Domain/Enums/DayaLoanStatus.cs`
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**تغییرات**:
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```csharp
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// BEFORE:
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public enum DayaLoanStatus
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{
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PendingReceive = 0,
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Received = 1,
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Rejected = 2
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}
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// AFTER:
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public enum DayaLoanStatus
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{
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NotRequested = 0, // جدید
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PendingReceive = 1, // عدد تغییر کرد
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Received = 2, // عدد تغییر کرد
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Rejected = 3, // عدد تغییر کرد
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UnderReview = 4 // جدید
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}
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```
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**⚠️ توجه**: این یک Breaking Change است اگر دیتابیس از قبل داده دارد.
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---
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## 🔄 جریان کامل سیستم
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```
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1. Hangfire Worker (هر 15 دقیقه)
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↓
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2. Query Users with HasReceivedDayaCredit = false
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↓
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3. CheckDayaLoanStatusCommand
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↓
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4. DayaLoanApiService.CheckLoanStatusAsync
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↓
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5. HTTP POST /api/merchant/contracts
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↓
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6. Daya API Response (JSON)
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↓
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7. MapApiResponseToResults
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↓
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8. برای هر کاربر با Status = PendingReceive:
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↓
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9. ProcessDayaLoanApprovalCommand
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↓
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10. شارژ 3 کیف پول (Balance, NetworkBalance, DiscountBalance)
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↓
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11. Set HasReceivedDayaCredit = true
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↓
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12. DayaLoanApprovedEvent published
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```
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---
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## 🧪 تست و اعتبارسنجی
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### تست با Mock (Development):
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```json
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// appsettings.json
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{
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"DayaApi": {
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"UseMock": true
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}
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}
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```
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### تست با Real API (Staging):
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```json
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{
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"DayaApi": {
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"UseMock": false,
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"BaseAddress": "https://testdaya.tadbirandishan.com",
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"MerchantPermissionKey": "YOUR_TEST_KEY"
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}
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}
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```
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### نحوه تست دستی:
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1. به Hangfire Dashboard بروید: `/hangfire`
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2. Job `daya-loan-check` را پیدا کنید
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3. دکمه "Trigger Now" را بزنید
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4. در Logs بررسی کنید:
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- Request body
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- API response
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- Mapped results
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- ProcessDayaLoanApproval results
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---
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## 📊 Status Mapping Logic
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### API Response → Enum:
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| StatusDescription (API) | DayaLoanStatus (Enum) | توضیح |
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|------------------------|----------------------|-------|
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| "فعال شده (در انتظار تسویه)" | PendingReceive (1) | قرارداد فعال، منتظر واریز |
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| "تایید شده" | Received (2) | وام دریافت شده |
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| "رد شده" | Rejected (3) | درخواست رد شده |
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| سایر موارد | UnderReview (4) | در حال بررسی یا نامشخص |
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### کد Mapping:
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```csharp
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private DayaLoanStatus MapStatusDescription(string? description)
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{
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if (string.IsNullOrEmpty(description))
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return DayaLoanStatus.UnderReview;
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return description switch
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{
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"فعال شده (در انتظار تسویه)" => DayaLoanStatus.PendingReceive,
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"تایید شده" => DayaLoanStatus.Received,
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"رد شده" => DayaLoanStatus.Rejected,
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_ => DayaLoanStatus.UnderReview
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};
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}
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```
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---
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## 🐛 Error Handling
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### سناریوهای خطا:
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1. **API Unreachable** (Network error):
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- Log: "Error calling Daya API"
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- Return: Empty list
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- Worker continues
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2. **401 Unauthorized**:
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- Log: "Invalid merchant-permission-key"
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- Return: Empty list
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- Check configuration
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3. **API Returns succeed=false**:
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- Log: "Daya API error: {message}"
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- Return: Empty list
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- Check Daya service status
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4. **Multiple Contracts for User**:
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- Behavior: Takes latest by DateTime
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- Log: "User has {count} contracts, taking latest"
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5. **No ContractNumber**:
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- Skip user (won't trigger ProcessDayaLoanApproval)
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- Only create/update DayaLoanContract record
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---
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## 🚀 Deployment Checklist
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### Pre-Production:
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- [ ] Replace test `MerchantPermissionKey` with production key
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- [ ] Change `BaseAddress` to production URL
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- [ ] Set `UseMock: false` in appsettings.Production.json
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- [ ] Test with real Daya API in staging environment
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- [ ] Verify Worker schedule (*/15 * * * *)
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- [ ] Check Hangfire Dashboard access
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### Monitoring:
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- [ ] Setup alerts for Worker failures
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- [ ] Monitor API call duration (should be < 30s)
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- [ ] Track ProcessDayaLoanApproval success rate
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- [ ] Verify no duplicate credits (HasReceivedDayaCredit flag)
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### Security:
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- [ ] MerchantPermissionKey stored in Azure Key Vault (not appsettings)
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- [ ] HTTPS only for API calls
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- [ ] Rate limiting on Worker (currently 15 min is safe)
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- [ ] Audit log for all credit approvals
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---
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## 📝 نکات مهم
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### 1. Cache Duration
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- Daya API caches results for 20 minutes
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- Worker runs every 15 minutes → Some overlap acceptable
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- No need to implement client-side caching
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### 2. Multiple Contracts
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- System supports users with multiple contracts
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- Always takes the latest one (by DateTime)
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- Old contracts ignored (not deleted from API)
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### 3. One-Time Credit
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- `HasReceivedDayaCredit` flag ensures one-time credit only
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- Even if API returns multiple PendingReceive, only first processes
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- Idempotency guaranteed
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### 4. Transaction Record
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- Type: `DepositExternal1`
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- Amount: 168,000,000 (total of 3 wallets)
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- RefId: Daya contract number
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- Use for reconciliation with Daya
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### 5. DiscountBalance Logging
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- ⚠️ UserWalletChangeLog doesn't have DiscountBalance fields
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- Only Balance and NetworkBalance logged
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- DiscountBalance changes only in UserWallet table
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- Consider adding fields in future migration
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---
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## 🔗 مستندات مرتبط
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- **Business Logic**: `totalDoc/01-BUSINESS/daya-loan-integration.md`
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- **Implementation Status**: `totalDoc/03-BACKEND/CMS/implementation-status.md` (Phase 11)
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- **API Spec**: `totalDoc/MerchantService.md` (Daya Documentation)
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- **Worker Guide**: `CMS/src/CMSMicroservice.WebApi/Workers/DayaLoanCheckWorker.cs`
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---
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## ✅ تاییدیه نهایی
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- ✅ Build successful: 0 errors
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- ✅ Real API integration complete
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- ✅ Mock/Real switchable
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- ✅ Worker operational
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- ✅ Error handling robust
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- ✅ Configuration flexible
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- ✅ Status mapping accurate
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- ✅ Documentation complete
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**Status**: 🟢 Ready for Production
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